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/*
* Copyright 2022 Codeblog Corp. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// ^ that comment is required or the builtins generator will have a fit.
function from(items) {
"use strict";
if (!@isConstructor(this))
@throwTypeError("Buffer.from requires |this| to be a constructor");
// TODO: figure out why private symbol not found
if (typeof items === 'string' || (typeof items === 'object' && items && (items instanceof ArrayBuffer || items instanceof SharedArrayBuffer))) {
switch (@argumentCount()) {
case 1: {
return new this(items);
}
case 2: {
return new this(items, @argument(1));
}
default: {
return new this(items, @argument(1), @argument(2));
}
}
}
var arrayLike = @toObject(items, "Buffer.from requires an array-like object - not null or undefined");
// Buffer-specific fast path:
// - uninitialized memory
// - use .set
if (@isTypedArrayView(arrayLike)) {
var length = @typedArrayLength(arrayLike);
var result = this.allocUnsafe(length);
result.set(arrayLike);
return result;
}
// Don't pass the second argument because Node's Buffer.from doesn't accept
// a function and Uint8Array.from requires it if it exists
// That means we cannot use @tailCallFowrardArguments here, sadly
return this.toBuffer(@Uint8Array.from(arrayLike));
}
|
